# ------------------------------------------------------------------------------
#  mainframe.tcl
#  This file is part of Unifix BWidget Toolkit
#  $Id: mainframe.tcl,v 1.8 2001/06/11 23:57:50 hobbs Exp $
# ------------------------------------------------------------------------------
#  Index of commands:
#     - MainFrame::create
#     - MainFrame::configure
#     - MainFrame::cget
#     - MainFrame::getframe
#     - MainFrame::addtoolbar
#     - MainFrame::gettoolbar
#     - MainFrame::addindicator
#     - MainFrame::getindicator
#     - MainFrame::getmenu
#     - MainFrame::menuonly
#     - MainFrame::showtoolbar
#     - MainFrame::showstatusbar
#     - MainFrame::_create_menubar
#     - MainFrame::_create_entries
#     - MainFrame::_parse_name
#     - MainFrame::_parse_accelerator
# ------------------------------------------------------------------------------

namespace eval MainFrame {
    ProgressBar::use

    Widget::bwinclude MainFrame ProgressBar .status.prg \
        remove {
            -fg -bg -bd -troughcolor -background -borderwidth
            -relief -orient -width -height
        } \
        rename {
            -maximum    -progressmax
            -variable   -progressvar
            -type       -progresstype
            -foreground -progressfg
        }

    Widget::declare MainFrame {
        {-width        TkResource 0      0 frame}
        {-height       TkResource 0      0 frame}
        {-background   TkResource ""     0 frame}
        {-textvariable String     ""     0}
        {-menu         String     {}     1}
        {-separator    Enum       both   1 {none top bottom both}}
        {-bg           Synonym    -background}
    }

    Widget::addmap MainFrame "" .frame  {-width {} -height {} -background {}}
    Widget::addmap MainFrame "" .topf   {-background {}}
    Widget::addmap MainFrame "" .botf   {-background {}}
    Widget::addmap MainFrame "" .status {-background {}}
    Widget::addmap MainFrame "" .status.label {-background {}}
    Widget::addmap MainFrame "" .status.indf  {-background {}}
    Widget::addmap MainFrame "" .status.prgf  {-background {}}
    Widget::addmap MainFrame ProgressBar .status.prg {-background {} -background -troughcolor}

    proc ::MainFrame { path args } { return [eval MainFrame::create $path $args] }
    proc use {} {}

    variable _widget
}


# ------------------------------------------------------------------------------
#  Command MainFrame::create
# ------------------------------------------------------------------------------
proc MainFrame::create { path args } {
    global   tcl_platform
    variable _widget

    set path [frame $path -takefocus 0 -highlightthickness 0]
    set top  [winfo parent $path]
    if { [string compare [winfo toplevel $path] $top] } {
        destroy $path
        return -code error "parent must be a toplevel"
    }
    Widget::init MainFrame $path $args

    if { $tcl_platform(platform) == "unix" } {
        set relief raised
        set bd     1
    } else {
        set relief flat
        set bd     0
    }
    set topframe  [eval frame $path.topf -relief flat -borderwidth 0 \
	    [Widget::subcget $path .topf]]
    set userframe [eval frame $path.frame [Widget::subcget $path .frame] \
                       -relief $relief -borderwidth $bd]
    set botframe  [eval frame $path.botf -relief $relief -borderwidth $bd \
	    [Widget::subcget $path .botf]]

    pack $topframe -fill x
    grid columnconfigure $topframe 0 -weight 1

    set bg [Widget::cget $path -background]
    $path configure -background $bg
    if { $tcl_platform(platform) != "unix" } {
        set sepopt [Widget::getoption $path -separator]
        if { $sepopt == "both" || $sepopt == "top" } {
            set sep [Separator::create $path.sep -orient horizontal -background $bg]
            pack $sep -fill x
        }
        if { $sepopt == "both" || $sepopt == "bottom" } {
            set sep [Separator::create $botframe.sep -orient horizontal -background $bg]
            pack $sep -fill x
        }
    }

    # --- status bar -------------------------------------------------------------------------
    set status   [frame $path.status -relief flat -borderwidth 0 \
                      -takefocus 0 -highlightthickness 0 -background $bg]
    set label    [label $status.label -textvariable [Widget::getoption $path -textvariable] \
                      -takefocus 0 -highlightthickness 0 -background $bg]
    set indframe [frame $status.indf -relief flat -borderwidth 0 \
                      -takefocus 0 -highlightthickness 0 -background $bg]
    set prgframe [frame $status.prgf -relief flat -borderwidth 0 \
                      -takefocus 0 -highlightthickness 0 -background $bg]

    place $label    -anchor w -x 0 -rely 0.5
    place $indframe -anchor ne -relx 1 -y 0 -relheight 1
    pack  $prgframe -in $indframe -side left -padx 2
    $status configure -height [winfo reqheight $label]

    set progress [eval ProgressBar::create $status.prg [Widget::subcget $path .status.prg] \
                      -width       50 \
                      -height      [expr {[winfo reqheight $label]-2}] \
                      -borderwidth 1 \
                      -relief      sunken]
    pack $status    -in $botframe -fill x -pady 2
    pack $botframe  -side bottom -fill x
    pack $userframe -fill both -expand yes

    set _widget($path,top)      $top
    set _widget($path,ntoolbar) 0
    set _widget($path,nindic)   0

    set menu [Widget::getoption $path -menu]
    if { [llength $menu] } {
        _create_menubar $path $menu
    }

    bind $path <Destroy> {MainFrame::_destroy %W}

    rename $path ::$path:cmd
    proc ::$path { cmd args } "return \[eval MainFrame::\$cmd $path \$args\]"

    return $path
}


# ------------------------------------------------------------------------------
#  Command MainFrame::configure
# ------------------------------------------------------------------------------
proc MainFrame::configure { path args } {
    variable _widget

    set res [Widget::configure $path $args]

    if { [Widget::hasChanged $path -textvariable newv] } {
        uplevel \#0 $path.status.label configure -textvariable [list $newv]
    }

    if { [Widget::hasChanged $path -background bg] } {
        set listmenu [$_widget($path,top) cget -menu]
        while { [llength $listmenu] } {
            set newlist {}
            foreach menu $listmenu {
                $menu configure -background $bg
                set newlist [concat $newlist [winfo children $menu]]
            }
            set listmenu $newlist
        }
        foreach sep {.sep .botf.sep} {
            if { [winfo exists $path.$sep] } {
                Separator::configure $path.$sep -background $bg
            }
        }
        foreach w [winfo children $path.topf] {
            $w configure -background $bg
        }
    }
    return $res
}


# ------------------------------------------------------------------------------
#  Command MainFrame::cget
# ------------------------------------------------------------------------------
proc MainFrame::cget { path option } {
    return [Widget::cget $path $option]
}


# ------------------------------------------------------------------------------
#  Command MainFrame::getframe
# ------------------------------------------------------------------------------
proc MainFrame::getframe { path } {
    return $path.frame
}


# ------------------------------------------------------------------------------
#  Command MainFrame::addtoolbar
# ------------------------------------------------------------------------------
proc MainFrame::addtoolbar { path } {
    global   tcl_platform
    variable _widget

    set index     $_widget($path,ntoolbar)
    set toolframe $path.topf.f$index
    set toolbar   $path.topf.tb$index
    set bg        [Widget::getoption $path -background]
    if { $tcl_platform(platform) == "unix" } {
        frame $toolframe -relief raised -borderwidth 1 \
            -takefocus 0 -highlightthickness 0 -background $bg
    } else {
        frame $toolframe -relief flat -borderwidth 0 -takefocus 0 \
            -highlightthickness 0 -background $bg
        set sep [Separator::create $toolframe.sep -orient horizontal -background $bg]
        pack $sep -fill x
    }
    set toolbar [frame $toolbar -relief flat -borderwidth 2 \
                     -takefocus 0 -highlightthickness 0 -background $bg]
    pack $toolbar -in $toolframe -anchor w
    incr _widget($path,ntoolbar)
    grid $toolframe -column 0 -row $index -sticky ew
    return $toolbar
}


# ------------------------------------------------------------------------------
#  Command MainFrame::gettoolbar
# ------------------------------------------------------------------------------
proc MainFrame::gettoolbar { path index } {
    return $path.topf.tb$index
}


# ------------------------------------------------------------------------------
#  Command MainFrame::addindicator
# ------------------------------------------------------------------------------
proc MainFrame::addindicator { path args } {
    variable _widget

    set index $_widget($path,nindic)
    set indic $path.status.indf.f$index
    eval label $indic $args -relief sunken -borderwidth 1 \
        -takefocus 0 -highlightthickness 0

    pack $indic -side left -anchor w -padx 2 -fill y -expand 1

    incr _widget($path,nindic)

    return $indic
}


# ------------------------------------------------------------------------------
#  Command MainFrame::getindicator
# ------------------------------------------------------------------------------
proc MainFrame::getindicator { path index } {
    return $path.status.indf.f$index
}


# ------------------------------------------------------------------------------
#  Command MainFrame::getmenu
# ------------------------------------------------------------------------------
proc MainFrame::getmenu { path menuid } {
    variable _widget

    if { [info exists _widget($path,menuid,$menuid)] } {
        return $_widget($path,menuid,$menuid)
    }
    return ""
}


# -----------------------------------------------------------------------------
#  Command MainFrame::setmenustate
# -----------------------------------------------------------------------------
proc MainFrame::setmenustate { path tag state } {
    variable _widget

    #    if { [info exists _widget($path,tags,$tag)] } {
    #        foreach {menu entry} $_widget($path,tags,$tag) {
    #            $menu entryconfigure $entry -state $state
    #        }
    #    }

    # We need a more sophisticated state system.
    # The original model was this:  each menu item has a list of tags;
    # whenever any one of those tags changed state, the menu item did too.
    # This makes it hard to have items that are enabled only when both tagA and
    # tagB are.  The new model therefore only sets the menustate to enabled
    # when ALL of its tags are enabled.

    # First see if this is a real tag
    if { [info exists _widget($path,tagstate,$tag)] } {
	if { [string compare $state "disabled"] } {
	    set _widget($path,tagstate,$tag) 1
	} else {
	    set _widget($path,tagstate,$tag) 0
	}
	foreach {menu entry} $_widget($path,tags,$tag) {
	    set expression "1"
	    foreach menutag $_widget($path,menutags,[list $menu $entry]) {
		append expression " && $_widget($path,tagstate,$menutag)"
	    }
	    if { [expr $expression] } {
		set state normal
	    } else {
		set state disabled
	    }
	    $menu entryconfigure $entry -state $state
	}
    }
    return
}


# -----------------------------------------------------------------------------
#  Command MainFrame::menuonly
# ----------------------d------------------------------------------------------
proc MainFrame::menuonly { path } {
    variable _widget

    catch {pack forget $path.sep}
    catch {pack forget $path.botf.sep}
    catch {pack forget $path.frame}
}

# ------------------------------------------------------------------------------
#  Command MainFrame::showtoolbar
# ------------------------------------------------------------------------------
proc MainFrame::showtoolbar { path index bool } {
    variable _widget

    set toolframe $path.topf.f$index
    if { [winfo exists $toolframe] } {
        if { !$bool && [llength [grid info $toolframe]] } {
            grid forget $toolframe
            $path.topf configure -height 1
        } elseif { $bool && ![llength [grid info $toolframe]] } {
            grid $toolframe -column 0 -row $index -sticky ew
        }
    }
}


# ------------------------------------------------------------------------------
#  Command MainFrame::showstatusbar
# ------------------------------------------------------------------------------
proc MainFrame::showstatusbar { path name } {
    set status $path.status
    if { ![string compare $name "none"] } {
        pack forget $status
    } else {
        pack $status -fill x
        switch -- $name {
            status {
                catch {pack forget $status.prg}
            }
            progression {
                pack $status.prg -in $status.prgf
            }
        }
    }
}


# ------------------------------------------------------------------------------
#  Command MainFrame::_destroy
# ------------------------------------------------------------------------------
proc MainFrame::_destroy { path } {
    variable _widget

    Widget::destroy $path
    catch {destroy [$_widget($path,top) cget -menu]}
    $_widget($path,top) configure -menu {}

    # Unset all of the state vars associated with this main frame.
    foreach index [array names _widget $path,*] {
	unset _widget($index)
    }
    rename $path {}
}


# ------------------------------------------------------------------------------
#  Command MainFrame::_create_menubar
# ------------------------------------------------------------------------------
proc MainFrame::_create_menubar { path descmenu } {
    variable _widget
    global    tcl_platform

    set bg      [Widget::getoption $path -background]
    set top     $_widget($path,top)
    if { $tcl_platform(platform) == "unix" } {
        set menubar [menu $top.menubar -tearoff 0 -background $bg -borderwidth 1]
    } else {
        set menubar [menu $top.menubar -tearoff 0 -background $bg]
    }
    $top configure -menu $menubar

    set count 0
    foreach {name tags menuid tearoff entries} $descmenu {
        set opt  [_parse_name $name]
        if { [string length $menuid] && ![info exists _widget($path,menuid,$menuid)] } {
            # menu has identifier
	    # we use it for its pathname, to enable special menu entries
	    # (help, system, ...)
	    set menu $menubar.$menuid
        } else {
	    set menu $menubar.menu$count
	}
        eval $menubar add cascad $opt -menu $menu
        menu $menu -tearoff $tearoff -background $bg
        foreach tag $tags {
            lappend _widget($path,tags,$tag) $menubar $count
	    # ericm@scriptics:  Add a tagstate tracker
	    if { ![info exists _widget($path,tagstate,$tag)] } {
		set _widget($path,tagstate,$tag) 0
	    }
        }
	# ericm@scriptics.com:  Add mapping from menu items to tags
	set _widget($path,menutags,[list $menubar $count]) $tags
	    
        if { [string length $menuid] } {
            # menu has identifier
            set _widget($path,menuid,$menuid) $menu
        }
        _create_entries $path $menu $bg $entries
        incr count
    }
}


# ------------------------------------------------------------------------------
#  Command MainFrame::_create_entries
# ------------------------------------------------------------------------------
proc MainFrame::_create_entries { path menu bg entries } {
    variable _widget

    set count      [$menu cget -tearoff]
    set registered 0
    foreach entry $entries {
        set len  [llength $entry]
        set type [lindex $entry 0]

        if { ![string compare $type "separator"] } {
            $menu add separator
            incr count
            continue
        }

        # entry name and tags
        set opt  [_parse_name [lindex $entry 1]]
        set tags [lindex $entry 2]
        foreach tag $tags {
            lappend _widget($path,tags,$tag) $menu $count
	    # ericm@scriptics:  Add a tagstate tracker
	    if { ![info exists _widget($path,tagstate,$tag)] } {
		set _widget($path,tagstate,$tag) 0
	    }
        }
	# ericm@scriptics.com:  Add mapping from menu items to tags
	set _widget($path,menutags,[list $menu $count]) $tags

        if { ![string compare $type "cascad"] } {
            set menuid  [lindex $entry 3]
            set tearoff [lindex $entry 4]
            set submenu $menu.menu$count
            eval $menu add cascad $opt -menu $submenu
            menu $submenu -tearoff $tearoff -background $bg
            if { [string length $menuid] } {
                # menu has identifier
                set _widget($path,menuid,$menuid) $submenu
            }
            _create_entries $path $submenu $bg [lindex $entry 5]
            incr count
            continue
        }

        # entry help description
        set desc [lindex $entry 3]
        if { [string length $desc] } {
            if { !$registered } {
                DynamicHelp::register $menu menu [Widget::getoption $path -textvariable]
                set registered 1
            }
            DynamicHelp::register $menu menuentry $count $desc
        }

        # entry accelerator
        set accel [_parse_accelerator [lindex $entry 4]]
        if { [llength $accel] } {
            lappend opt -accelerator [lindex $accel 0]
            bind $_widget($path,top) [lindex $accel 1] "$menu invoke $count"
        }

        # user options
        set useropt [lrange $entry 5 end]
        if { ![string compare $type "command"] || 
             ![string compare $type "radiobutton"] ||
             ![string compare $type "checkbutton"] } {
            eval $menu add $type $opt $useropt
        } else {
            return -code error "invalid menu type \"$type\""
        }
        incr count
    }
}


# ------------------------------------------------------------------------------
#  Command MainFrame::_parse_name
# ------------------------------------------------------------------------------
proc MainFrame::_parse_name { menuname } {
    set idx [string first "&" $menuname]
    if { $idx == -1 } {
        return [list -label $menuname]
    } else {
        set beg [string range $menuname 0 [expr {$idx-1}]]
        set end [string range $menuname [expr {$idx+1}] end]
        append beg $end
        return [list -label $beg -underline $idx]
    }
}


# MainFrame::_parse_accelerator --
#
#	Given a key combo description, construct an appropriate human readable
#	string (for display on as a menu accelerator) and the corresponding
#	bind event.
#
# Arguments:
#	desc	a list with the following format:
#			?sequence? key
#		sequence may be None, Ctrl, Alt, or CtrlAlt
#		key may be any key
#
# Results:
#	{accel event}	a list containing the accelerator string and the event

proc MainFrame::_parse_accelerator { desc } {
    if { [llength $desc] == 1 } {
	set seq None
	set key [string tolower [lindex $desc 0]]
    } elseif { [llength $desc] == 2 } {
        set seq [lindex $desc 0]
        set key [string tolower [lindex $desc 1]]
	# If the key is an F key (ie, F1, F2, etc), it has to be capitalized
	if {[regexp {f[1]?[0-9]*} $key]} {
	    set key [string toupper $key]
	}
    } else {
	return {}
    }
    switch -- $seq {
	None {
	    set accel "[string toupper $key]"
	    set event "<Key-$key>"
	}
	Ctrl {
	    set accel "Ctrl+[string toupper $key]"
	    set event "<Control-Key-$key>"
	}
	Alt {
	    set accel "Alt+[string toupper $key]"
	    set event "<Alt-Key-$key>"
	}
	CtrlAlt {
	    set accel "Ctrl+Alt+[string toupper $key]"
	    set event "<Control-Alt-Key-$key>"
	}
	default {
	    return -code error "invalid accelerator code $seq"
	}
    }
    return [list $accel $event]
}


